Looks like all those rumors yesterday were true -- Microsoft has just posted up the official standalone version of Vista SP1. Sure, you've been able to get it in one way or another for a while now, but if you're into silly things like "legit OS updates," the wow (SP1) is now.

Update: Here are the release notes -- as we've known for a while now, it's mostly bug fixes and performance tweaks, but the sheer volume of 'em is something to behold.